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A simple magnifying lens is used in such...

A simple magnifying lens is used in such a way that an image is formed at `25 cm` away from the eye. In order to have 10 times magnification, the focal length of the lens should be

A

`5 cm`

B

`2 cm`

C

`25 mm`

D

`0.1 mm`

Text Solution

Verified by Experts

The correct Answer is:
C
`m = 1+(D)/(f_(e)) rArr 10 = 1+(25)/(f_(e))`
`f_(e) = (25)/(9)cm ~~ 25mm`
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